To ensure that the yarn.lock file is not update, you will need to use the -frozen-lockfile flag. The results will be written to yarn.lock.

If the yarn.lock file is absent, or is not enough to satisfy all the dependencies that are listed in package.json (for instance, if you manually add a dependency to your package.json), Yarn will look for the newest versions available that satisfy the constraints in package.json.

If a yarn.lock file is present and it is enough to satisfy all the dependencies listed in package.json, the exact versions that are recorded in yarn.lock are installed, and the yarn.lock will be unchanged.

The yarn.lock file will be utilized in the following way: When you run the yarn install command, it will install all the dependencies listed in the package.json into a local node_modules folder. This can be achieved by passing in the -frozen-lockfile flag. Most times, when you are working with continuous integration systems, you will need reproducible dependencies. Yarn -flat will default to yarn install -flat. It will default to yarn install and then pass through any flag that you provided, for example, When you run yarn on the command line without any other command.

However, in yarn both commands have been replaced by yarn add -dev and yarn add respectively. If you are coming from an npm background, you are most likely used to seeing something like npm install -save-dev or npm install -save. It is commonly used when you have just checked out code for a project, or when you need to pick up a dependency that another developer on your project has added to the project. The yarn install command is a command that is used to install all dependencies for a project. In this tutorial we will be examining the yarn install CLI command.

Managing dependencies and Upgrading dependency.

Yarn prune,Yarn publish and Yarn remove.

Yarn create, Yarn dedupe, Yarn generate-lock-entry, and Yarn global.

Yarn install